Safety-gate for elevators.



M. MOUL,

SAFETY GATE FOR ELEVATORS.

APPLiCATlON FILED AUG-2|. I917 Patenfed Nov. 6, 1917.

5 IiiIiiiiiiiiiiiiiLM nwmioz PW/memo UNITED STATES PATENT o FioE.

MARTIN MOUL, or naivovnn, PENNSYLVANIA.

sarnrrearn 'ron ELEVATORS.

Specification of Letters Patent. I

Patented Nov. 6, 1917.

Application filed August 21, 1917. Serial No. 187,339.

To all whom it may concern:

Be it known that I, MARTIN MOUL, a citizen of the United-States,residing at Hanover, county of York, and State of Pennsylvania, haveinvented certain new and useful Improvements in Safety-Gates forElevators,'of which the following is a specification.

The object of my invention is the provision of an improvedcage-controlled latch-.

ing mechanism for holding open an automatically. closing safety gate forfreight elevators which requires opening by hand,

therebycomplying with laws or regulations which prohibitthe use .of anautomatically opening gate and approve a self closing gate which must beopened by hand and latched.

In carrying out my invention I provide a simple, reliable, andpositively actuated latching mechanism which is operated by the cagewhen the latter'is at the landing to so condition the parts that whenthe counterweighted gate is opened byhand, it

willbe latched and will remain in that condition'until the cage leavesthe landing, whereupon the latch will release the gate and the latterwill thenautomatically close.

The improved mechanism constituting my invention comprises a latch forengaging and holding open of the gate, a rock-shaft cooperativelyrelated thereto, a spring actuated pull rod for turning the rock-shaft,

and a trip or shoe for operating the pull rod,

. lines;

Fig. 2 is a side clevationthereof with cer-' tain parts broken away andothers in section; and

Rig. 3 is a detail perspective of the rockshaft and oppositely setcranks.

It'will be understood that the gate and my mechanism can 'be used at anylanding and in connection with any elevator but 1t.

7 is illustrated with a freight elevator such as is commonly used infactories, warehouses, and-the hke.

Two of the floors or land ngs are shown at 1, 2, the counterweight boxfor the cage appears at 3, the cage at 4, and one of the guides is shownat 5. V

Dotted lines 6 represent a sliding gate hanger and is automaticallyclosed by a counterweight 7.. The gate 6 is intended to be opened byhand and slides laterally across the side of the elevator shaft. Thecounterweight 7 keeps the gate normally closed.

Depending from the ceiling or the landing are hangers 8. A rock-shaft'9is jour-- naled in the hangers and carries oppositely set cranks 10, 11.A gravity latch 12 which is pivoted to a suitable bracket 13, isadaptedto drop over and engage a latch member 14 carried by the gate 6 when thegate is slid to open position as shownin Fig. 1.

The upper face of the member 14 and the to which is hung by any suitablesheave door face of the, head of the latch are inclined or curved sothat the latch will ride on the member 14 and then drop into lockingengagement with it, when the gate is opened. To permit this rise of thelatch, it ipprovided with a slotted link 15 pivoted at 16 and receivingthe pin 17 on the crank 10..

,Pivoted at 18 to the counterweight box-- 3 is a trip or shoe 19 whichis suitably curved so that it will be properly engaged by the cage 4when the latter is going either up or down. be provided on the cagewhere it engages the trip. A pullro'd 21 is engaged at its Antiefrictionrollers 20 may upper end with the crank 11 at 22 and at its lower endwith trip 19 at 23. A coil spring 24 surrounds the rod 21 between anadjustable set-collar 25 carried by the rodand a bracket 26 on thecounterweight box' 3. The expansion of the spring 24 can be regulated bymoving the collar 25-along the rodandfastening it in the desiredposition.

The expansion of the spring positions the trip 19 where it will beengaged by the mar '12. Consequently, when the cage is above-0r belowthelanding, the gate .6 is free and is held'in closed position bycounterweight 7. v g When the cage arrives at a landing, the trip 19 ispressed back,.thereby elevating the rod 21, rocking the shaft 9 andlowering the latch 12 to a position where'it will lock the l 110 gateopen when the latter is opened by hand aslshown in Fig. 1. The gate willremain ers 20 and also normally elevates the latch the action of the.

in open, locked, position as longas the cage 5 ridthereby, a latchadapted to engage and. "1

stays at that landing. "When the cage moves from the landing, the spring24 swings the trip and also elevates the latch; consequently, the gateis released immediately the cage leaves the landing and the gate thenautomatically closes.

Having thus described my intention What I claim as new, and desire tosecure by Letters Patent, is v The combination With a self-closing gatefor an elevator, of a cageoontrolled latchcomprising a trip arranged ingmechanism to be engaged by the cage When thelatter is the landing, arock-shaft, cranks eari aeaeee lock the gate when the latter is opened,a link having a pin and. slot connection With one of the-cranks,- a pullrod connecting the remaining crank with the trip, a bracket, a collar onthe pull rod, and a coil spring surrounding the pull rod and interposedbe tween the collar and the bracket, said spring keeping the tripnormally in position for engagement by the cage and the latch normallyout of position for engagement With the gate.

In testimony whereof, ll hereunto athx my signature.

Man nt Mom

